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Journal : Journal of Tropical Crop Science

Biomass Partitioning of Cassava (Manihot esculenta Crantz) at Various Doses of Nitrogen Fertilization Gili, Oktaviana Rosario Sere; Suwarto; Hartono, Arief; Herdiyeni, Yeni
Journal of Tropical Crop Science Vol. 12 No. 01 (2025): Journal of Tropical Crop Science
Publisher : Department of Agronomy and Horticulture, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jtcs.12.01.10-17

Abstract

The distribution of carbohydrates across different plant organs, or carbohydrate partitioning, is a vital indicator of nitrogen use efficiency and resource allocation in plants. This study aimed to evaluate the impact of varying nitrogen fertilization rates on carbohydrate partitioning in cassava (Manihot esculenta Crantz). A randomized block design was used with six nitrogen dose treatments (0, 45, 90, 135, 180, 225 kg.ha-1) and four replications. Parameters observed included dry weight and carbohydrate distribution in roots, stems, leaves, root tubers, and petioles over eight months after planting (MAP). Results indicated that nitrogen fertilization significantly influenced cassava plants’ dry weight and carbohydrate partitioning, with optimal nitrogen doses varying by plant organ and growth stage. Nitrogen application enhanced carbohydrate allocation to root tubers, particularly from 3 to 8 MAP.
Application of Rapid Multiplication Technique Using Mini Cutting and NPK Compound Fertilizer to Increase Production of Sweet Potato Cuttings (Ipomoea batatas L.) Dewi, Ni Kadek Ema Sustia; Suhartanto, M. Rahmad; Suwarto, Suwarto
Journal of Tropical Crop Science Vol. 7 No. 03 (2020): Journal of Tropical Crop Science
Publisher : Department of Agronomy and Horticulture, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jtcs.7.03.162-170

Abstract

Rapid Multiplication Technique (RMT) is a technique used to produce large scale cuttings of sweet potato in a short period by using mini cuttings and proper fertilizer management. The research was carried out from October 2019 to March 2020 and composed of two experiments The first experiment involved a randomized complete block design, with clones (“Ase Kapas” and “Ase Merah”) as the first factor, and tuber weight (150 ± 25 g, 250 ± 25 g, and 350 ± 25 g) as the second factor. The second experiment was arranged in a split-plot design involving different doses of NPK compound fertilizer (as main plot) and different source of cuttings (as subplots). The different doses included NPK 16:16:16 at 100 kg.ha-1 (0.3 g per polybag), 200 kg.ha-1 (0.6 g per polybag), 300 kg.ha-1 (0.9 g per polybag), and without fertilizer as control. The source of cuttings were from the tip, middle and bottom stem of the plants. Results showed that the “Ase Kapas” showed the highest number and the longest shoots, number of nodes, and length of vines. Additionally, tuber weight of ± 350 g produced the highest number of shoots. When it comes to NPK compound fertilizer treatment, a dose of 0.9 g per polybag increased cutting production in “Ase Kapas”, and also responded better to fertilizer treatment. On the other hand, dose of 0.3 g increased cutting production in “Ase Merah”. “Ase Kapas” produced more cuttings from the middle stem, whereas “Ase Merah” produced more cuttings from the . The application of RMT in “Ase Kapas” produced cuttings with ratio of 1:31, which is higher than those in “Ase Merah” with a ratio of 1:17.
Forage Potential of Plant Species Found in Various Ecosystems in Musi Banyuasin Regency, South Sumatera, Indonesia Kanny, Putri Irene; Chozin, M.A.; Santosa, Edi; Guntoro, Dwi; Zaman, Sofyan; Suwarto, Suwarto; Kurniawati, Ani
Journal of Tropical Crop Science Vol. 9 No. 01 (2022): Journal of Tropical Crop Science
Publisher : Department of Agronomy and Horticulture, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jtcs.9.01.68-76

Abstract

Forage is an important component in sustainable smallholder livestock. The purpose of the study was to identify the diversity of natural plant species in various ecosystems, as well as their potential as forage. Based on our surveys of palm oil plantation, rubber plantation, and home gardens using the quadrant method, we identified approximately 50 species comprising the natural vegetation of our study area. Out of 50, we identified 39 broad-leaved species, 9 grasses (Poaceae) species, and 2 sedges (Cyperaceae) species. The palm oil plantation had 29 species dominated by Ottochloa nodosa (11.92%) and Asystasia gangetica (11.40%); 25 species were found in the rubber plantation dominated by Cynodon dactylon (28.42%) and Panicum repens (9.20%), and home gardens contained 30 species dominated by Eleusine indica (13.39%) and Ageratum conyzoides (9.60%). Among the 29 species found in the palm oil plantation, 13 were observed to have low palatability scores, and 16 species have high palatability scores. Based on their high palatability scores, the following species can be utilized as forage for Balinese cattle: Cyrtococcum acrescens, Eleusine indica, Centrosema pubescens, Paspalum conjugatum, and Sida rhombifolia.
Biomulch Treatment Effects on Weed Control and Soil Properties in Cassava Plantation Suwitono, Bayu; Chozin, Muhamad Achmad; Guntoro, Dwi; Suwarto, Suwarto
Journal of Tropical Crop Science Vol. 10 No. 02 (2023): Journal of Tropical Crop Science
Publisher : Department of Agronomy and Horticulture, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jtcs.10.02.111-123

Abstract

Legume Cover Crop (LCC) are plants grown as live mulch so that it is beneficial to the agro-ecosystem and can be included in cropping systems to regulate soil fertility and suppress weed growth. This study aims to determine the benefits of using Arachis pintoi as biomulch applied at different times on weed composition and soil fertility. The experiment was carried out at the Teaching farm of IPB, Jonggol, West Java, Indonesia; the soil type is Ultisol. This study used two factors and was designed in a factorial randomized block design. The first factor was four accessions of cassava “Ketan Malang”, “Genjah Bayam”, “IR Jonggol”, and “Manggu”; the second factor is the time of the biomulch planting: 4, 8, and 12 weeks before planting the cassava, at cassava planting, and without biomulch + manual weeding as the control. Weed vegetation was analyzed before land preparation and before cassava harvest. The physical and chemical properties of the soil were analyzed before and after the biomulch treatment. Our study demonstrated that Melastoma malabathricum, Tetracera indica, Oxalis barrelieri, Mimosa invisa, Ottochloa nodosa, Ipomoea sp and Cyperus sp. are the dominant weeds in the cassava plantation. Biomulch planted four and eight weeks before cassava was able to reduce weed dry weight. All biomulch treatments were able to improve soil density and total pore space. Soil with biomulch planted eight weeks before cassava planting had the highest C-organic (7.59%) and total nitrogen (0.41%).
Effectivity of borate micro fertilizer on yield of cucumber (Cucumis sativus L.) Suwarto, Suwarto; Hilmi, Muhammad; Hapsari, Dhika Prita
Journal of Tropical Crop Science Vol. 11 No. 01 (2024): Journal of Tropical Crop Science
Publisher : Department of Agronomy and Horticulture, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jtcs.11.01.82-90

Abstract

Boron (B) is one of the most essential nutrients for fertilization and the production of fruits and seeds, however the availability of boron in soil is very limited. The aim for this experiment is to test the borate micro fertilizer to improve the growth and production of cucumber (Cucumis sativus). The fertilizer used in this experiment is borate micro fertilizer which contain 46% or 460 g.kg-1 B2O3. The experiment was conducted at Cibadak Village, Sukaresmi District, Cianjur Regency, West Java Province. Treatments in this experiment were arranged within five rates of fertilizer, which are: without fertilizer (P0); 0.5 rate of Borate fertilizer (0.5 B) (P1); 1.0 rate of Borate fertilizer (1.0 B) (P2); 1.5 rate of Borate fertilizer (1.5 B) (P3); and 2.0 rate of Borate fertilizer (2.0 B) (P4). The result showed that the treatment of 0.5 to 2.0 rate of borate micro fertilizer can produce growth characteristics and plants that are better compared to the control treatment. Applicating 0.5 rate of borate micro fertilizer even has the capacity of yielding production up to 48.960 kg.ha-1. The 0.5 rate of Borate micro fertilizer treatment was concluded as the most effective one compared to other treatments, due to its capacity to produce the highest relative agronomical effectivity value, which is 152%. The recommended rate of Borate fertilizer is 25 kg.ha-1 given by soil drench at 15 and 30 DAP (days after planting) with the concentration is 1.5 g.L-1 and the volume is 250 ml/plant.
Growth and Production of Cassavas in Intercropping System with Cowpeas Sinaga, Intan Lorenza; Suwarto, Suwarto; Purnamawati, Heni; Guntoro, Dwi
Journal of Tropical Crop Science Vol. 11 No. 02 (2024): Journal of Tropical Crop Science
Publisher : Department of Agronomy and Horticulture, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jtcs.11.02.128-136

Abstract

Cassava is one of the most important commodities worldwide, serving as a crucial food source due to its rich content of nutrients such as carbohydrates, protein, fat, calcium, and magnesium. Cassava is a perennial crop with slow growth, necessitating the selection of intercrops with shorter harvest periods. Cowpea, a legume high in protein, is widely cultivated and suitable for intercropping with cassava. Intercropping these crops involves adjusting planting distances to optimize yield. This study aims to determine the optimal planting distance in an intercropping system that yields the highest productivity for the cassava variety “Mangu” and the cowpea varieties “Albina” and “Uno”. The research was conducted from January to June 2023 at the IPB Experimental Farm in Sawahbaru, Dramaga, Bogor, on Latosol soil, at an altitude of 207 meters above sea level. The study utilized a randomized complete block design with a single factor: the intercropping system pattern. The patterns tested were 1:2 (one row of cassava with two rows of cowpea) and 1:3 (one row of cassava with three rows of cowpea), consisting of: P1: “Mangu” and “Uno” 1:2; P2: “Mangu” and “Uno” 1:3; P3: “Mangu” and “Albina” 1:2; P4: “Mangu” and “Albina” 1:3; P5: “Mangu” monoculture; P6: “Uno” monoculture; P7: “Albina” monoculture. The results indicated that the P3 planting system yielded the highest crown height at 1, 5, and 6 months after planting (MAP), the highest canopy diameter at 4 months after planting, tuber production, and 100 seed weight of cowpea. The P4 system produced the highest stem diameter, number of leaves, number of pods, pod dry weight, and seed dry weight at 9 months after planting.
Co-Authors , Handoko ., Wajilan Abdillah Abbas, Zainul ABDUL KARIM MAKARIM Abdul Qadir Abdulrohman, Alfin Adi, Defiyanto Djami Afaf, Sausanil Afriyenis, Clara Agustin Agung Wibowo Agus Hariyanto AGUS PURWANTO Agus Purwanto Agustin, Dinni Agustinus Tri Aryanto, Agustinus Tri Ahmad Bahrudin ahmad farid Ahmad Izzuddin Ahmad S. Solihin Aini, Syifa Nur Ainulia, Afifah Nindya Alamsyah, Abimanyu Prasetyo Alfanan , Azir Alfanan, Azir Alhafid, Ahmadfalih Amalia, Afni Khanifatul Amin Kuncoro, Amin Ananta, Vicky Reynaldi Andry Stepahnie Titing Anggi Riska Wardani Ani Kurniawati Annas, Sofian Anny Rosiana Masithoh Anung Suwarno, Anung Anwar, Radhiya Nur Anwari Adi Nugroho, Anwari Apriyan, Nur Ardani, Tri Ayu Ardiansyah Japlani, Ardiansyah Ari Wahyuni Arif Arif Arif Arif Arini Hidayah Arini Purnamasari Ariska, Meta Ayu Ariwibowo, Bagus Joni Ariyanto Nugroho Ariyanto, Arief Subakti Armania, Valerry Arumsari, Tyas Asep Setiawan Asta Hidayanti Atik Setiawan Wahyuningsih Audria, Anggun Melvana Awang Maharijaya Ayu Nabila, Diah Aziz, Ixwan Arif Abdul Aznur, Firmansyah Baransano, Imelda Basuki, Umar Benedictus Sudiyana Bergita Novilan Bias Cintaning, Anis Buana, Lalu Yahya Surya Budiono, R Chatrina, Nanda Feby Christiana Sebatubun, Magdalena Priska Darmawan davidson, harlley Dedy Prasetya Kristiadi Devilito, Rio Dewi Hartinah Dewi Nur Wakhidah Dhika Prita Hapsari Dhina Cahya Rohim Diaguna, Ridwan Diah Agustina, Diah Dian Novita Sari, Dian Novita Didy Sopandie Diki Ihwan Mulhaedi Diman, Diman Diman Dimas Angga Negoro Dina Septariasari Dinata, Dwi Elysia Diyahpangesti, Alfrida Dupri, Muhammad Demsi Dwi Guntoro Dwianto, Fitri Dwiningtyas Padmaningrum, Dwiningtyas Edi Santosa Edy Soesanto Efrendi, Riski Eka Saraswati Eko Bambang Murdiansyah Eko Eri Susanti Eko Sulistyono Endang Sawitri Endang Warih Minarni Eny Lestari Erizal Erizal Etik Wukir Tini Evayusvita Rustam, Evayusvita Evi Elisanti, Evi Fahmi, Muhammad Yusron Fajar Ilhamy, Muhammad Rizki Fajarwati, Nurul Faqih Udin Faraliana Saputri, Katarina Farida Nugrahani Fariza Yulia Kartika Sari Fariza Yulia Kartikasari Farohi, Ima Fathimah Isnina Fathur Rahman Rustan Fauzan Ramadhan Febriyanto Fidiansyah, Arief Fitri Kumalasari Fitri Kumalasari, Fitri Fitriana Kartikasari Fitriana, Linda Fitriani Fitriani, Eka Lusi Fitrianingrum - Fitrianingrum Fitrianingrum Fitriasqi, Nesa Aleysia Furqoni, Hafith Gaprilla Gaprilla Ghifari, Muhammad Fuad Gili, Oktaviana Rosario Sere Gumayanti, Fitri Gumelar, Agus Guntur Nugroho Habib, Muhamad Hadisaputra, Sugeng Hafith Furqoni, SP., M.Si. Ph.D. Handayani, Sri Hania nurbayti Hanifah Febriana Cahyani Hanny, Wanda Alifa Hapzi Ali Harahap, Said Arsandi Naim Hardiani, Siti Haryanto Haryanto Hasriyanti Hendriawan, Jemi Hendrik Hendrik Hendro Mulyanto Herdhata Agusta Heru Adi Djatmiko Hesti Paramita Sari Hexza Zahwa Novinka Putri Iffah Tsabita Ihsani Ikhsan, Latif Hidayatul Ilala, Oze Dora Ilham, Fadhil Indanah Indradewa, Rhian Irzal Effendi Iskandar Lubis Iskandriani, Amalia Islami Islami Ismanto Ismanto Istigfaroh, Yuliana Izak Yohan Matriks Lattu Jacob Daan Engel Jamal Mahbub Jeki Pornomo Jeki Purnomo Joko Winarno Junaidi Junaidi Kanny, Putri Irene Karubaba, Hendrika, Yovania Karunia Eka Lestari Khairawati Khairawati, Khairawati Khairullah, Adrian KHOIRUL ANAM Khotimah, Herliana Husnul KHUSNUL CHOTIMAH, KHUSNUL Kristian, Tadem Vergi Kristiyaningrum - Kristiyaningrum Kristiyaningrum Kumalasari, Rizki Kumalasari, Widiya Puji Kurniyanti, Rizka Minda La Ode Dzakir Lattu, Izak Y.M Lattu, Izak YM Lattu, Izak Yohan Martriks Lelawati, Nina Lestari, Nor Puji Lexsi Susandi Lia Desyrakhmawati, Lia Lobby Loekmono, Lobby Lubis, Laila Wati Krisna Lukmono, Lobby M A Chozin M. Nur Khamid M.A. Chozin Madya Sulisno MAGHFIRAH Mahendra Wijaya Mangando, Mangando Mardiana, Sri Siska Mardiana, Yessi Marnida Marnida Marselina Endah Hiswati Maya Melati Mohamad Aris Prasetiyanto Mohamad Rahmad Suhartanto Mohammad Diqi Monaitaria, Abi Melin Mudinillah, Adam Muflikhan, Muhammad Muhamad Syukur Muhammad Abdur Rozaq Muhammad Ali Imron Muhammad Andri Baskara Muhammad Hilmi Muhammad Hilmi Muhammad, Rosyid Anwar Mujiyo Mujiyo Mukiman, Mukiman Mukti Widayati Mulyadi, Fadli Mulyana, Erik Mulyo Wicaksono, Teguh Munif Ghulamahdi Muwahhid, Suryani Latifah Nadillah Nurahma Nailufar, Yuyun Nani Septiana Naomi, Naomi Nasikah, Durotun Negoro, Dimas Angga Neti, Natali NI KADEK EMA SUSTIA DEWI Niar Astaginy Niar Astaginy Nindita, Anggi Nirmala Manik Nisari Rosdewi , Naomi Noor Hidayah Nope Gromikora Nova Nova Novaliyosi Nudiya, Nudiya Nugeraheni, Risma Ananda Nugraha, Yoga Dwi Nunuk Wiyarni Nur Hidayat Nur Rokhimah Hanik Nur Wulandari Nur, Subandi NurAini, Linda nurbayti, Hania Nurfadillah Lubis Nurfasiha, Nurfasiha Nurfian, Ani Nurris Septa Pratama, Nurris Septa Nursita Haerna, Alfira Rahma Nursyafika, Nursyafika Nurul Hidayati Ode Dzakir, La Okta Yosiana Dewi Oktavia, Nurbaiti Oktoviandy, Oktoviandy Pambudi, Ignatius Harry Tri Pandie, Daud Pangestu, Prestiani Yulia Parhadi Parhadi Parhadi, Parhadi Permadi, Elvin Poalahi Salu, Sahrul Praharseno, Fikri Pramono, Endro Pratama, Fadilah Pratama, M Hafidh Aditya Prihatiningsih, Endang Puji Lestari, Nor Purnamawati, dan Heni Purnomo, Muh. Purwono Putra, Muhammad Bintang Darma Putri Permatasari, Putri Putri, Sasha Triana Putri, Siti Rahmayanti Widya Qadir, Abdul Rafi Haritsandi Rafiq Zulkarnaen Ratmono Ratmono, Ratmono Ratna Dewi Eskundari Ratna Wardani Ratnawati, Anik Renaldi, Ahmad Renoardi, Amos Retno Setyowati, Retno Retno Wulandari Ridwan, Mukhsin Rika Amelia Rina Rembah Rio Devilito Riska Riska Risman Risman Rois, Mohamad Romadhoni, Desi Romdoni, Arif Rosyad, Astryani Rudang Astari Sinaga, Tamara Rusdianto Roestam S. siregar, Bernardus Wishman Sabhila, Tasya Herma Sadino, S Sagala, Elizabet Sahrul Sahrul Sahuri Sahuri, Sahuri Saipul Hamdi Sandi, Yusri Iryas SANTOSO SANTOSO Santoso, Aris Priyo Agus Saparso Saparso Sapja Anantanyu, Sapja Saputra, Satria Dwi Nuvanur Saputri, Jheny Manda Sari, Intan Novita Sari, Rindu Famelia Sarjani, Alvita Sekar Selamet Fuadi Septiana Rosa Dewi, Septiana Rosa Septiana, Nani Septiani Septiani Sesadana Mutaqien, Allvin Setiaji Pamungkas, Nur Setiawan Setiawan Setiawan Setiyono, Karnawan Joko Setyaningsih, Desi Siburian, Sationa Carmelita Sinaga, Intan Lorenza Siti Marwiyah Soekardi, Rodiyah Sofyan Zaman Sri Budiani Sri Mulyani Stefanus Santosa Sudarmi, Finus Setia SUDARMONO SUDARMONO Sudirman Yahya Sudirman Yahya Sudiyana , Benedictus Sugeng Sugeng Sugeng Sugeng, S Sugihardjo Sugihardjo Sugiyanta Suharto Suharto Suharto, Akhmad Sukarmin Sukarmin Sukarmin Sukarmin, S Sulaiman, Sriwahyuningsih Sularno Sularno, Sularno Sulistiani, Ade Irma Sumiati Sumiati Suminah Suminah, Suminah Suminar, Ratna Suparman Suparman Suparman Suranto Suranto Suri, Nursukma Suroso Suroso Suryadi Suryono Suryono Sutarno Sutarno Sutopo, Novi Rahmawati Sutrisno, Sutrisno Suwarno, Punjung Medaraji Suwitono, Bayu Syahrul Syahrul Syahrul Tampak, Tony Tampake , Tony Tampake, Tonny Tampake, Tony Robert Christian Tandilittin, Harsman Tantri Yanuar Rahmat Syah Tato, Markus Tobing, Jeremia C.L. TRI ASTUTI Tri Hartitia Trihadi Hermansyah Valentina, Rida Dwi W Wahyuni, W Wahidah, Yulia Wahjoedi Wahjoedi Wahjoedi Wahju Q. Mugnisjah Wahju Qamara Mugnisjah wahyuni wahyuni Wajilan, Wajilan Wardana, Ali Wardono Wasino Wasino Wicaksono, M Rafi Widiyanto Widiyanto Widodo, Ananda Rizky Widyani, Eka Wiladiyah, Lala winanto, winanto Wiratri, Arsita Dyah Wisnu Sapto Nugroho, Wisnu Sapto Wiwik Hartatik Wiwik Sugiarti Wiyarni - Wiyarni Wiyarni Wonua, Almansyah Rundu Wulandari, Asri Febi Yahya S.B., Lalu Yateno Yateno Yateno Yatjong, Isramyano YL Sukestiyarno YM. Lattu, Izak Yosanta, Frida Yudiarso, Hari Sapto Yuliani, Titiek Yulianti Ramdiani Yulisetyaningrum Yulistyaningrum, Y Yunita Rusidah Zakina, Besse Ririn Zaman, Sopyan